biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 11:236, 1969 | DOI: 10.1007/BF02920802

Trunk contraction ofHevea brasiliensis due to tapping

J. Luštinec1, J. Simmer1, W. L. Resing1
1 Rubber Research Institute of Cambodia, Khum de Chup, Cambodia

Determination of bark contraction due to tapping made simultaneously at different positions on the trunk ofHevea trees (young PR 107, S/2 ↓) provided information about the flow area and the speed of contration spreading.
The relation between truck contraction at the given distance from the cut and the amount of latex tapped was experessed in mathematical terms. A quantitative relation was also established between the yields of latex and the linear dimension of flow areas in longitudinal direction below the middle of tapping cut.
From the contraction curves it is deduced that the lateral flow of latex becomes relatively more important with increasing yields.

Received: July 26, 1968; Published: May 1, 1969  Show citation

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Luštinec, J., Simmer, J., & Resing, W.L. (1969). Trunk contraction ofHevea brasiliensis due to tapping. Biologia plantarum, 11(3), 236. doi: 10.1007/BF02920802
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    References

    1. Boatman, S. G.: Preliminary physiological studies on the promotion of latex flow by plant growth regulators.-J. Rubb. Res. Inst. Malaya19: 243-258, 1966.
    2. Frey-Wyssling, A.: Investigations on the dilution reaction and the movement of the latex ofHevea brasiliensis during tapping.-Arch. Rubbercult.16: 285-327, 1932.
    3. Gooding, E. G. B.: Studies in the physiology of latex II. Latex flow on tappingHevea brasiliensis: associated changes in trunk diameter and latex concentration.-New Phytol.51: 11-29. 1952a. Go to original source...
    4. Gooding, E. G. B.: A note on Pyke's dendrometer.-New Phytol.51: 258-259, 1952b. Go to original source...
    5. Luštinec, J., Chai Kim Chun, Resing, W. L.: L'aire drainée chez les jeunes arbres de l'Hevea brasiliensis.-Rev. Gén. Caout. Plast.43: 1343-1354, 1966.
    6. Luštinec, J., Resing, W. L., Simmer, J.: Distinction des deux composants de l'aire drainée sur le tronc de l'Hevea brasiliensis.-Biol. Plant.10: 284-295, 1968. Go to original source...
    7. Ninane, F.: Relations entre les facteurs écologiques et les variations journalières dans la physiologie et les rendements de l'Hevea brasiliensis. Possibilités d'applications pratiques.-Opuscule Technique IRCC No 12, 1967.
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    9. Southorn, W. A.: Local changes in bark dimensions ofHevea brasiliensis very close to the tapping cut.-J. Rubb. Res. Inst. Malaya20: 36-43, 1967.

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